Process of weaving loop pile fabrics



June` 9, 1936. w. T. WILSON 2,043,942

PROCESS OF vWEAVING LOOP PILE FABRICS Filed March 5, 1934 \10 WITNESS S: INVENTOR:

mummfljwuson ATTORNEY Patented June 9, 1936 PATENT OFFICE PROCESS OF WEAVING LOOP PILE FABRICS William T. Wilson, Philadelphia, Pa., assigner of one-half to James A. Fligg, Philadelphia, Pa.

Application March 5,

7 Claims.

This invention relates to a method of weaving loop pile fabric, and has for an object to provide a new method whereby two complete loop pile fabrics are woven simultaneously. 5 A further object of the invention is to provide a method whereby two loop pile fabrics are woven simultaneously with the loops of the` two fabrics formed intermediate the bases of the fabrics, and with the loops interspersed.

A further object of the invention is to provide a method whereby two loop pile fabrics are woven facing each other by the simultaneous throwing of two shuttles and the proper shedding of the base and pile threads whereby the loops of one fabric are formed between adjacent loops of the other fabric but independent thereof and separable each from the other. Y

A further object of the invention is to provide a method of weaving two loop pile fabrics face 20 to face with an interposed gauge over and under which alternately two shuttles are thrown, and the base threads and pile threads properly shedded at each pick to form fabrics face to face with the loops of one fabric formed intermediate the loops of the other fabric and freely separable when said fabrics pass olf from the end of the gauge.

The invention, therefore, comprises shedding a gauge to the lower limit of heddle movement, 30 together with base threads for the lower fabric, with a base thread of the upper fabric and one pile thread moving to the upper limit of heddle movement, and a base thread of the upper fabric and another pile thread shedded to an intermediate position forming two sheds through which two shuttles are simultaneously thrown to produce a first pick, then shedding the gauge to the upper limit of heddle movement, together with both base threads of the upper fabric, a 40 base thread of the lower fabric and the recently intermediate pile thread to the lower limit of heddle movement, one base thread of the lower fabric and the recently upper pile thread to intermediate positions forming two sheds, throwing two shuttles through two threads, and beating up at each pick to move the fabric in the usual wellknown manner until it passes over the end of the gauge, whereupon each fabric separates from the other.

The drawing illustrates an embodiment of the invention and the views therein are as follows:

Figure 1 is a diagrammatic view of the shedding which may be considered for the purposes of illustration, the first pick,

Figure 2 is a diagrammatic view of the shed- 1934, Serial No. '714,054

ding of the various Warp threads which may be considered the second pick, and

Figure 3 is a diagrammatic view of the completed fabric showing the fabric passing off from the end of the gauge and the two fabrics separating.

Like characters of reference indicate corresponding parts throughout the several views.

In carrying out the present method some type of loom is employed. The invention may be carried out upon a great number of different types of looms, but in any such loom heddles I of substantially the usual and ordinary type must be employed.

A reed II and shuttles I2 are also employed. The reed II and shuttles I2 are of substantially standard equipment.

A gauge I3 is employed of such type as to be shedded by the movement of its associated hed-Y dle. The base of the upper fabric is formed by base threads I4 and I5, and the base of the lower fabric by base threads I6 and I'I. These base threads I4 to II inclusive pass through the eyes of their respective heddles and are shedded as will be hereinafter more fully described.

The pile thread of the upper fabric is indicated at I 8 and that of the lower fabric at I 9, likewise passing through the eyes of their respective heddles.

The terms upper fabric and "lower fabric are employed merely as illustrative and as applicable to the drawing as presented and have no actual meaning in the invention other than explanatory.

Also, the gauge I3 is shown as passing through and beyond the eye of its heddle, but it is to be understood that any type of gauge which is capable of being shedded is within the scope of the present invention, and may stop at its particular heddle and not pass beyond.

In the method of weaving a relation of the parts, which may be referred to as the first pick, is illustrated at Figure 1, wherein one of the base threads I4 and a pile thread I8 are moved to the upward limit of heddle movement, while the gauge I3 and both of the base threads I6 and II are moved to the lower limit of heddle movement, and one base thread I of the upper fabric and the pile thread I9 of the lower fabric are moved into intermediate positions, as illustrated.

At this point both shuttles I2 are simultaneously thrown. Of course, after throwing the shuttles the threads are beat up by the reed in the usual well-known manner. Upon the return of the reed, the threads are shedded to the position shown at Figure 2, which may be considered the second pick. In this relation the gauge I3 has been shedded to the upward limit of heddle movement together with both base threads I 4 and I5 of the upper fabric, while the pile thread I8 of the upper fabric and the base thread I6 of the lower fabric are positioned centrally, as shown at Figure 2.

Both shuttles are again thrown and the threads beat up in the usual well-known manner. The third pick is the same as pick I, as illustrated at Figure 1, except for the positions of the base threads. In the third pick the base thread I5 is maintained in the upper position while the base thread I4 is in the intermediate position and both the base threads I6 and I'I of the lower fabric are moved to the lower position as is the gauge I3.

'I'he pile threads are shedded the same as at Figure 1.

In the fourth pick the base thread I6 is at the lower limit, the pile thread I9 of the lower fabric is positioned at the lower limit of heddle movement, while both the base threads I4 and I5 of the upper fabric occupy the upward position as does the gauge I3. In other words, in the weaving, the pile threads repeat at every second pick, whereas the base threads repeat at every fourth pick.

The third and fourth picks are not illustrated for the reason that the shedding of the base threads are in accordance with the well-known practice of weaving such fabric.

The base threads, therefore, are woven into the fabric only at each second pick, that is to say, as shown at Figure l, both threads I6 and Il are down and are, therefore, idle, no filler thread being thrown between them, whereas the upper base threads I4 and I5 are shedded and a thread is thrown between these two base threads.

At the second pick, as illustrated at Figure 2, both of the base threads of the upper fabric are idle, and a filler thread is woven between the base threads of the lower fabric.

It is, of course, necessary that the idle base threads I6 and II, as shown at Figure 1, should be shedded at the next pick, and at that pick, the base threads of the upper fabric are idle, whereas at the fourth pick, the threads of the upper fabric are shedded and the threads of the lower fabric are idle. The pile threads are, however, shedded at each pick.

After the several picks have been completed as above described, the fabric is moved in the direction indicated by the arrows at the several figures, until the sustaining threads 2S pass olf from the end of the gauge I3, whereupon said two fabrics may be separated, as illustrated more particularly at Figure 3, and, of course, rolled in the usual manner, the sustaining threads after passing from the gauge being idle, as is well known in the loop pile fabric art.

I claim:-

l. The method of weaving two loop pile fabrics simultaneously, consisting in shedding a gauge to the lower limit of heddle movement, together with the base threads of the lower fabric shedding one base thread of the upper fabric and the pile thread of the upper fabric to the upper limit of heddle movement, and the other base thread of the upper fabric and the pile thread of the lower fabric to an intermediate position forming two sheds, throwing two shuttles simultaneously through said two sheds and beating up the threads, shedding the gauge to the upper limit of heddle movement, together with the base threads of the upper fabric, one base thread of the lower fabric and the pile thread of the lower fabric being shedded to the lower limit of heddle movement, the other base thread of the lower fabric and the pile thread of the upper fabric being at a central position, throwing two shuttles simultaneously through the two sheds formed thereby, and beating up the threads so thrown, shedding the gauge, together with the base threads of the lower fabric to the lower limit of heddle movement, shedding one base thread of the upper fabric which was in the intermediate position at the first pick, together with the pile thread of the upper fabric to the upper limit of heddle movement, with the other base thread of the upper fabric and the pile thread of the lower fabric being shedded to intermediate position forming tWo sheds, throwing the two shuttles simultaneously through the two sheds, beating up the threads thrown by the shuttle, shedding the base thread of the lower fabric which was in the central position at the second pick together with the pile thread of the lower fabric to the lower limit of heddle movement, shedding both base threads of the upper fabric together with the gauge to the upper limit of heddle movement, with the other base thread of the lower fabric and the pile thread of the upper fabric being in a central position forming two sheds, throwing two shuttles simultaneously through the sheds so formed, and beating up the threads thrown by the shuttles.

2. The method of weaving two loop pile fabrics simultaneously and in face to face relationship, consisting in shedding base and pile warp threads to form upper and lower sheds, shedding a gauge alternately between the upper side of the upper shed and the lower side of the lower shed, throwing two weft threads simultaneously through said two sheds after each change of the sheds and beating up the weft threads.

3. The method of weaving two loop pile fabrics face to face simultaneously, consisting in shedding base and pile warp threads to form upper and lower sheds, shedding a gauge alternately between the upper side of the upper shed and the lower side of the lower shed, throwing two weft threads simultaneously through said two sheds after each change of the sheds and beating up the weft threads.

4. The method of weaving two loop pile fabrics simultaneously and in face to face relationship, consisting in shedding base and pile warp threads to form upper and lower sheds, with the pile Warp of each fabric always forming a part of the shed of its respective fabric, shedding a gauge alternately between the upper side of the upper shed and the lower side of the lower shed, throwing two weft threads simultaneously through said two sheds after each change of the sheds and beating up the weft threads.

5. The method of weaving two loop pile fabrics simultaneously and in face to face relationship, consisting in shedding base and pile warp threads to form upper and lower sheds, shedding a gauge alternately between the upper side of the upper shed and the lower side of the lower shed, throwing two weft threads simultaneously at each pick through said two sheds after each change of the sheds and beating up the weft threads.

6. The method of weaving two loop pile fabrics face to face simultaneously, consisting in shedding base and pile warp threads to form upper and lower sheds with the pile warp of each fabric always forming a part of the shed of its respective fabric, shedding a gauge alternately between the upper side of the upper shed and the lower side of the lower shed, throwing two weft threads simultaneously at each pick through said two sheds after each change of the sheds and beating up the weft threads.

7. 'Ihe method of weaving two loop pile fabrics simultaneously'face to face, consisting in shedding a gauge to the lower limit of heddle movement, together with the base threads of the lower fabric, shedding one base thread of the upper fabric and the pile threadof the upper fabric to the upper limit of heddle movement, another base thread of the upper fabric and a pile thread of the lower fabric occupying a central position forming two sheds, throwing two shuttles simultaneously through said two sheds and beating up the threads, shedding the gauge to the upper limit of heddle movement, together with the base threads of the upper fabric, one base thread of the lower fabric and the pile thread of the lower fabric being shedded to the lower limit of heddle movement, with another base thread of the lower fabric, and the pile thread of the upper fabric occupying an intermediate position forming two sheds, throwing two shuttles simultaneously through said two sheds, beating up the threads, shedding the gauge, together with the base threads of the lower fabric to the lowermost limit of heddle movement, shedding the base thread of the upper fabric which was in the central position at the first pick and the pile thread of the upper fabric to the uppermost limit of heddle movement, the pile thread of the lower fabric and the other base thread of the upper fabric occupying an intermediate position and forming two sheds, throwing two shuttles simultaneously through said two sheds and beating up the threads, shedding the gauge to the upper position of heddle movement together with the base threads of the upper fabric, shedding the pile thread of the lower fabric and the base thread of the lower fabric which was in thev central position at the second pick to the lowermost limit of heddle movement, with the other base thread, and the pile thread of the upper fabric occupying an intermediate position forming two sheds, throwing two shuttles simultaneously through the two sheds so formed, beating up the threads, and repeating.

WILLIAM T. WILSON. 

